Ios – iTunes Connect: How to choose a good SKU


I'm reading the iTunes Connect Developer Guide as I'm trying to add a new application to iTunes Connect.

I'm a bit confused about the SKU number which I should provide. On page 81 in the above developer guide they provide an example of their data for their application Orange Ball.

They have chosen Orange_Ball_01 for the SKU Number. What is the 01 indicating – that it is version 1? Why use underscore? Why not just type “OrangeBall”, if that SKU is not used?

Update notes:

Best Solution

You are able to choose one that you like, but it has to be unique.

Every time I have to enter the SKU I use the App identifier (e.g. de.mycompany.myappname) because this is already unique.